What do you use for a drop or work light?

I use a CFL bulb in the reg caged housing, and I cut the bottom section of a clear water bottle and stick it over the curly bulb to protect it, partic. from welding flash melting a lite tube.
Lasts forever, No heat, drops often without breaking, easy clean cover (new bottle), choice of brightness.
AND - the CFL doesn't trigger the welding mask into dark, as many other lite sources do.